mail server DNS configuration questions
kdk at daleco.biz
Sun Sep 7 03:08:25 UTC 2008
Andrew Falanga wrote:
> Well, my clients at church are still having issues and after working with
> George, a respondant to my original questions, I think that most, if not all,
> of my problems are related to DNS and how we've got it improperly configured.
> First, a crude drawing of how our mail server exists in the world:
> 192.168.2.x/24 126.96.36.199 "lot's of networks"
> Private Network <--> CableOne <--> Internet
> Now, our mail server's IP is 192.168.2.23. On the router, he (the person at
> whose house the mail server is) has IP forwarding setup so that mail get's
> sent to our FreeBSD machine. Using dig, here's the responses:
> (from my FBSD machine at home, not the server)
> -> dig +short -t MX whitneybaptist.org
> 10 mail.whitneybaptist.org.
> -> dig +short -t A whitneybaptist.org
> -> dig +short -x 188.8.131.52
> (from the church FBSD machine)
> -> hostname
> -> ifconfig fxp0
> fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> inet 192.168.2.23 netmask 0xffffff00 broadcast 255.255.255.255
> ether 00:d0:b7:74:87:48
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
> -> cat /etc/resolv.conf
> search McCutchanLAN
> nameserver 192.168.2.1
> It doesn't take a rocket scientist, or a computer scientist, to figure out
> we've got DNS issues. I'm thinking that I should setup a domain within the
> 192.168.2.0/24 network on this box. I've done this before, at work. The
> question I've got is I've never actually integrated a domain like this to a
> domain on the Internet. I'm thinking that we'll setup something like:
> internal.whitneybaptist.org with hosts in that sub-domain.
> So, what would my DNS tables need to look like to make this happen. Also, to
> any knowledgable souls here, what RFCs address these issues?
Andy, I'm not sure I'm DNS guru enough to answer all your
questions, but --- you don't specify what "problems" are
being experienced at the location, and, are you certain it's
not about this?
 Sat 06.Sep.2008 21:58:25
[kadmin at archangel][~/logs]
Host 252.34.24.72.in-addr.arpa. not found: 3(NXDOMAIN)
*Not having* a reverse entry for a mail server is often
the cause of issues.
And the RFC for ESMTP is #2821.
In Denver it is unlawful to lend your vacuum cleaner to your next-door
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